diff --git a/app/src/main/java/com/example/citrusclient/views/CreateTodoFragment.java b/app/src/main/java/com/example/citrusclient/views/CreateTodoFragment.java
index e63dc14..cd80709 100644
--- a/app/src/main/java/com/example/citrusclient/views/CreateTodoFragment.java
+++ b/app/src/main/java/com/example/citrusclient/views/CreateTodoFragment.java
@@ -139,7 +139,7 @@
 
         Spinner spinner = view.findViewById(R.id.select_todo_spinner);
         bookTitles = new ArrayList<>();
-        bookTitles.add("本を選択しない");
+        bookTitles.add("本を選択");
         booksViewModel.getBookLiveData().observe(getViewLifecycleOwner(), new Observer<HashMap<Integer, Book>>() {
             @Override
             public void onChanged(HashMap<Integer, Book> integerBookHashMap) {
@@ -179,6 +179,10 @@
                 Snackbar.make(view, "タイトルを入力してください", Snackbar.LENGTH_SHORT).show();
                 return;
             }
+            if(spinner.getSelectedItem().toString().equals("本を選択")){
+                Snackbar.make(view, "本を選択してください", Snackbar.LENGTH_SHORT).show();
+                return;
+            }
             todosViewModel.createTodo(accountId,spinner.getSelectedItemPosition(),year,month,day,title,token);
             ((MainActivity)getActivity()).showFragment(new HomeFragment());
         });